SAP Message /SAPPO/MSG326 - &1 is not a valid function module for the detail screen

Diagnosis A function module was entered in Customizing that does not meet therequirements. Therefore, the stamdard function module is used to call upthe detail screen /SAPPO/API_DETAIL_PROCESS. Procedure The function module entered in Customizing must have the same interfaceas the standard module. Make the necessary adjustments to the functionmodule.